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公开(公告)号：US20250164529A1
公开(公告)日：2025-05-22
申请号：US18512122
申请日：2023-11-17
Applicant: Allegro MicroSystems, LLC
Inventor： Maxwell McNally , Alexander Latham , Shixi Louis Liu , William P. Taylor
Abstract: Methods and apparatus for a current sensor integrated circuit package that includes a die having a first magnetic field sensing element and a leadframe to support the die. The leadframe has a U-shaped current conductor loop with a throat region and a first notch in the throat region of the current conductor loop. A first magnetic field sensing element is positioned in relation to the first notch. In some embodiments, the first magnetic field sensing element is aligned with an edge of the first notch.
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公开(公告)号：US20240004016A1
公开(公告)日：2024-01-04
申请号：US17804647
申请日：2022-05-31
Applicant: Allegro MicroSystems, LLC
Inventor： Yannick Vuillermet , Loïc André Messier , Simon E. Rock , Maxwell McNally , Alexander Latham , Andreas P. Friedrich
CPC classification number: G01R35/005 , G01R15/202 , G01R15/207 , G01R33/072
Abstract: Auto-calibrating current sensor integrated circuits (ICs) are configured for mounting at a position relative to a conductor. The auto-calibrating current sensor ICs can include a plurality of magnetic field sensing elements disposed at different locations within the integrated circuit, respectively, and can be configured to measure a magnetic field produced by a current carried by the conductor. The auto-calibrating sensors can include an electromagnetic model of the IC and the conductor. The model can be operative to determine a magnetic field at points in space due to a given current in the conductor at a known location of the conductor from the IC, and also the inverse situation of determining an unknown current and/or location of the conductor based on measurements of a magnetic field at known locations in space due to an unknown current in the conductor. Related auto-calibration methods are also described.
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公开(公告)号：US11366141B1
公开(公告)日：2022-06-21
申请号：US17160573
申请日：2021-01-28
Applicant: Allegro MicroSystems, LLC
Inventor： Steven Daubert , Sina Haji Alizad , Srujan Shivanakere , Maxwell McNally , Alexander Latham
Abstract: A current sensor includes a lead frame having a plurality of leads, at least two of which form a current conductor configured to carry a current that generates a magnetic field and a substrate having first and second opposing surfaces, the first surface proximate to said current conductor and the second surface distal from the current conductor. A first magnetic field transducer is disposed on the substrate and a first coil is disposed on the substrate adjacent to the first magnetic field transducer, wherein the first magnetic field transducer and the first coil are positioned on a first side of the current conductor. A second magnetic field transducer is disposed on the substrate and a second coil is disposed on the substrate adjacent to the second magnetic field transducer, wherein the second magnetic field transducer and the second coil are positioned on a second side of the current conductor.
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公开(公告)号：US20240264248A1
公开(公告)日：2024-08-08
申请号：US18164676
申请日：2023-02-06
Applicant: Allegro MicroSystems, LLC
Inventor： Tyler Daigle , Srujan Shivanakere , Maxwell McNally , Alec Smith , Steven Daubert
Abstract: Methods and apparatus for canceling inductive coupling in a magnetic field sensing device having one or more Hall elements. A device can include a Hall element having a first pair of first and second voltage sensing terminals at diametrically opposed locations on the Hall element, and a second pair of third and fourth voltage sensing terminals diametrically opposed locations on the Hall element. A first mirror conductive path extends around a perimeter of the Hall element in a first direction a second mirror conductive path extends around the perimeter of the Hall element in a second direction so that the first and second mirror conductive paths are on opposite sides of the Hall element and are equal and opposite to cancel inductive coupling.
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5.发明授权公开(公告)号：US11567890B2
公开(公告)日：2023-01-31
申请号：US16452804
申请日：2019-06-26
Applicant: Allegro MicroSystems, LLC
Inventor： Wade Bussing , Maxwell McNally
IPC: G06F13/40 , H03K17/687
Abstract: In one aspect, an electronic device includes a switching circuit connected to a resistance circuit and ground, the resistance circuit connected to a port and the port configured to be connected in series to an external resistor and a supply voltage. A voltage at the port is a first voltage that is less than the supply voltage if the switching circuit is enabled to be a closed circuit and the voltage at the port is a second voltage that is equal to the supply voltage if the switching circuit is enabled to be an open circuit.
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Patent Agency Ranking
公开(公告)号：US12270887B2
公开(公告)日：2025-04-08
申请号：US18480573
申请日：2023-10-04
Applicant: Allegro MicroSystems, LLC
Inventor： Yannick Vuillermet , Loïc André Messier , Simon E. Rock , Maxwell McNally , Alexander Latham , Andreas P. Friedrich
Abstract: Auto-calibrating current sensor integrated circuits (ICs) are configured for mounting at a position relative to a conductor. The auto-calibrating current sensor ICs can include a plurality of magnetic field sensing elements disposed at different locations within the integrated circuit, respectively, and can be configured to measure a magnetic field produced by a current carried by the conductor. The auto-calibrating sensors can include an electromagnetic model of the IC and the conductor. The model can be operative to determine a magnetic field at points in space due to a given current in the conductor at a known location of the conductor from the IC, and also the inverse situation of determining an unknown current and/or location of the conductor based on measurements of a magnetic field at known locations in space due to an unknown current in the conductor. Related auto-calibration methods are also described.
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公开(公告)号：US11885866B2
公开(公告)日：2024-01-30
申请号：US17804647
申请日：2022-05-31
Applicant: Allegro MicroSystems, LLC
Inventor： Yannick Vuillermet , Loïc André Messier , Simon E. Rock , Maxwell McNally , Alexander Latham , Andreas P. Friedrich
CPC classification number: G01R35/005 , G01R15/202 , G01R15/207 , G01R33/072
Abstract: Auto-calibrating current sensor integrated circuits (ICs) are configured for mounting at a position relative to a conductor. The auto-calibrating current sensor ICs can include a plurality of magnetic field sensing elements disposed at different locations within the integrated circuit, respectively, and can be configured to measure a magnetic field produced by a current carried by the conductor. The auto-calibrating sensors can include an electromagnetic model of the IC and the conductor. The model can be operative to determine a magnetic field at points in space due to a given current in the conductor at a known location of the conductor from the IC, and also the inverse situation of determining an unknown current and/or location of the conductor based on measurements of a magnetic field at known locations in space due to an unknown current in the conductor. Related auto-calibration methods are also described.
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公开(公告)号：US20240003995A1
公开(公告)日：2024-01-04
申请号：US17810353
申请日：2022-07-01
Applicant: Allegro MicroSystems, LLC
Inventor： Simon E. Rock , Georges El Bacha , Shaun D. Milano , Loïc André Messier , Alexander Latham , Maxwell McNally , Shixi Louis Liu
CPC classification number: G01R33/06 , G01R19/0092 , H05K1/181 , H05K2201/10151
Abstract: A current sensor IC includes a lead frame having a die attach pad and elongated leads extending in a single direction with respect to the die attach pad, a semiconductor die having a first surface attached to the die attach pad and a second, opposing surface supporting magnetic field sensing elements, and a non-conductive mold material. A first portion of the mold material encloses the semiconductor die and the die attach pad, a second portion of the mold material encloses a portion of the elongated leads, and the mold material further includes a wing structure between the first portion and the second portion. In assembly, the first portion of the mold material extends into a cutout through a current conductor and the wing structure abuts a surface of the conductor. The current sensor can implement differential sensing based on signals from at least two magnetic field sensing elements.
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公开(公告)号：US11768230B1
公开(公告)日：2023-09-26
申请号：US17657135
申请日：2022-03-30
Applicant: Allegro MicroSystems, LLC
Inventor： Shixi Louis Liu , Maxwell McNally , Alexander Latham
CPC classification number: G01R15/207 , H10N52/01 , H10N52/101 , H10N52/80
Abstract: A current sensor IC includes a unitary lead frame having a primary conductor with a first thickness and a secondary lead having a second thickness less than the first thickness. A semiconductor die adjacent to the primary conductor includes a magnetic field sensing circuit to sense a magnetic field associated with the current and generate a secondary signal indicative of the current. An insulation structure is disposed between the primary conductor and the die. A mold material encloses a first portion of the secondary lead and a second portion of the secondary lead that is exposed outside of the package has the second thickness. A method of manufacturing a current sensor IC includes providing a unitary lead frame sheet having a first thickness, decreasing a thickness of a portion of the sheet to provide a first portion with the first thickness and a second portion with a smaller thickness, and stamping the sheet to form a repeating lead frame pattern, with each pattern including a primary conductor formed from the first portion and secondary leads formed from the second portion.
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公开(公告)号：US20250147128A1
公开(公告)日：2025-05-08
申请号：US18503333
申请日：2023-11-07
Applicant: Allegro MicroSystems, LLC
Inventor： Tyler Daigle , Maxwell McNally , Steven Daubert , Alexander Latham
IPC: G01R33/09
Abstract: Methods and apparatus for a magnetic field sensor IC package having groups of arrays of TMR elements each having a pinning direction. An on-chip coil is routed under the TMR elements to conduct current for generating a magnetic field to stimulate the TMR elements. The device may be configured to sense changes in an applied magnetic field.
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